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Heating and cooling service across New Haven County, CT
The Guilford head office covers the shoreline half of the county, from Milford through New Haven to Madison, with Hamden and the inland towns close behind.
BDM Mechanical handles heating and cooling across the southern half of New Haven County, CT, from Milford and West Haven through New Haven, Hamden, Branford, Guilford and Madison. The phone is answered 24/7, and calls on this side are dispatched from the head office on Oxbow Ln in Guilford, so the shoreline is covered from both directions.
Old housing stock and a lot of oil heat
New Haven County holds some of the oldest housing in the state. Wooster Square, East Rock and the older streets of West Haven are full of houses with hot-water or steam radiators, while Hamden, North Haven and the Branford hills filled in with postwar capes and colonials on forced air. Along the water, plenty of summer cottages in Milford, East Haven and Branford became year-round homes, with heat added later and often sized by guesswork.
Gas mains reach the cities and most of the older neighborhoods, but much of Guilford, Madison and North Branford still burns oil or propane. That is why burner service, tank replacement and conversions are a regular part of the work on this side of the county. Heat pumps are catching up quickly, usually added alongside an existing boiler rather than replacing it outright.
Our regular range covers the shoreline towns and the first ring inland, from Milford and Orange through New Haven, Hamden and North Haven to Branford, Guilford and Madison. Waterbury, Meriden and the Naugatuck Valley are outside it, and we will say so on the phone rather than promise a visit we cannot keep.

Work we do most in the county
Steam boiler service
Low-water cutoffs, pressure controls, main vents and water hammer in the city's older steam houses.
Steam heat in New Haven CountyOil burner service
Yearly cleaning, nozzle and filter changes and combustion testing for oil boilers and furnaces.
Oil burner work in the countyBoiler replacement
Gas, oil and combi boilers sized to the radiators and baseboard you already have.
Replacing a boilerOil tank replacement
Basement and outdoor tanks swapped before they leak, with the old tank removed.
New oil tanksHeat pumps
Cold-climate units added beside an existing boiler for most of the season.
Adding a heat pumpRadiant floor heat
Hydronic loops for additions, kitchens and baths, run off the boiler you already have.
Radiant floors in the countyHow a call from New Haven County is handled
Calls from New Haven County reach the same 24/7 line as every other call, and the job goes to the head office on Oxbow Ln in Guilford, which covers New Haven County on routine runs. When the Guilford schedule is full on a cold night, the Bridgeport service office picks it up, and you are told which office is coming before anyone leaves.
Tell us the system type, the fuel and what it is doing when you call. A boiler that is short of water, a furnace flashing a code or a heat pump stuck in defrost each points to different parts.
Questions from New Haven County
The head office on Oxbow Ln in Guilford handles most calls on this side, and the Bridgeport service office backs it up for Milford, Orange and West Haven. One phone number reaches both.
Yes. Oil and propane boilers and furnaces are a large share of the work east of New Haven, including burner tune-ups, tank replacements and full system changes.
Usually, yes. A ductless or ducted heat pump can carry the shoulder seasons and much of the winter while the boiler stays in place for the coldest nights.
Other towns we cover close by
Fairfield County
From the Bridgeport service office we cover the southern half of the county.
Heating and cooling in Fairfield CountyNo heat or no cooling in New Haven County?
Tell us what the system is doing, and you get a time window on the same call, any hour.